Probability analysis of the fire structural resistance of aluminium plate

Afaghi Khatibi, A. and Chevali, V. and Feih, S. and Mouritz, A. P. (2016) Probability analysis of the fire structural resistance of aluminium plate. Fire Safety Journal, 83. pp. 15-24. ISSN 0379-7112

Abstract

An experimental and numerical study into the intrinsic scatter in the fire structural resistance of aluminium plate supporting tension loads is presented. Small-scale simulated fire structural tests performed on two aluminium alloys (AA5083 and AA6061) show for the first time a large amount of scatter in the tensile deformation rate and rupture stress. Multiple simulated fire tests conducted under identical heat flux exposure and tensile load conditions reveal scatter in the softening behaviour of the two aluminium alloys; there is large variability in the deformation rate, rupture stress and time-to-rupture, particularly at low stresses when creep dominates the softening process. Finite element analysis (incorporating elastic, plastic and creep softening effects) and elevated temperature material testing reveals that the scatter is caused mainly by variability in creep properties such as creep activation energy. A probability density function is used to quantify the scatter in the creep activation energy, and the finite element model using Monte Carlo simulations computes the scatter in the fire structural resistance of aluminium, which is not possible with existing deterministic models.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 18 Aug 2016 05:43
Last Modified: 04 Jun 2018 06:01
Uncontrolled Keywords: Fire; Structures; Aluminium; Failure; Model
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.firesaf.2016.04.004
URI: http://eprints.usq.edu.au/id/eprint/29606

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